Yzf 250 19 High compression piston

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12/11/2018 11:46 PM

Can it run on pump gas with 14.5:1? Which pipe gives the Best power? I Think about a Bills pipe or akaprovic

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12/12/2018 3:24 AM
Edited Date/Time: 12/12/2018 3:25 AM

Youll need at least 93 octane gas. Some bikes with HC pistons will run on it just fine and some wont. Try it and see.

About the pipe, i want to think FMF makes the most power. Double check that tho.

Also youll gain more power with a remap than with those two mods. Consider that.

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12/12/2018 5:57 PM

My 19 will not run on 93 here in Florida, USA. It detonates like crazy. Switched to recommended fuel, VP U4.4, and it is a monster of a motor now.

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12/12/2018 7:58 PM

Rocket Exhaust makes really good exhaust systems and can build them for custom builds and set ups. Check them out. Good prices too.

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12/12/2018 9:38 PM

GoYamaha wrote:

My 19 will not run on 93 here in Florida, USA. It detonates like crazy. Switched to recommended fuel, VP U4.4, and it is a ...more

How High compression? smile

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12/13/2018 1:42 PM

kb228 wrote:

Youll need at least 93 octane gas. Some bikes with HC pistons will run on it just fine and some wont. Try it and see.

About ...more

when you say remap you mean with the GYTR tuner? I was thinking about getting one but was told i should get an AM exhaust first. Or do you think i would benefit from a tuner.

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12/13/2018 4:48 PM

GoYamaha wrote:

My 19 will not run on 93 here in Florida, USA. It detonates like crazy. Switched to recommended fuel, VP U4.4, and it is a ...more

MadsDausel wrote:

How High compression? smile

I am running a 14.5:1 piston. Stock is 13.8:1. I am running U4.4 when above 85 degrees and MR12 below 85 degrees.

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12/13/2018 4:49 PM

kb228 wrote:

Youll need at least 93 octane gas. Some bikes with HC pistons will run on it just fine and some wont. Try it and see.

About ...more

ChrissyDMX wrote:

when you say remap you mean with the GYTR tuner? I was thinking about getting one but was told i should get an AM exhaust ...more

The 2019 does not need the GYTR tuner, it is app enabled.

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12/13/2018 9:52 PM

GoYamaha wrote:

My 19 will not run on 93 here in Florida, USA. It detonates like crazy. Switched to recommended fuel, VP U4.4, and it is a ...more

MadsDausel wrote:

How High compression? smile

GoYamaha wrote:

I am running a 14.5:1 piston. Stock is 13.8:1. I am running U4.4 when above 85 degrees and MR12 below 85 degrees.

How much more work to the engine? And have you try it on a dyno?

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12/14/2018 2:12 AM

A dyno would give anyone the best results. Sending your ecu off to get done by tokyo mods is 2nd best. Trial and error on your tuner app is also feasible. Ill bet theres a bank of maps developing online somewhere. That app thing is cool as hell.

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12/14/2018 5:47 AM

MadsDausel wrote:

How High compression? smile

GoYamaha wrote:

I am running a 14.5:1 piston. Stock is 13.8:1. I am running U4.4 when above 85 degrees and MR12 below 85 degrees.

MadsDausel wrote:

How much more work to the engine? And have you try it on a dyno?

It is a full motor.
High comp piston
GYTR head and cams
Carrillo Rod (balanced)
Polished, back cut and blued trans
Ceramic bearings throughout
Rad hoses, enlarged radiators
Full FMF Ti exhaust

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12/14/2018 5:51 AM

GoYamaha wrote:

I am running a 14.5:1 piston. Stock is 13.8:1. I am running U4.4 when above 85 degrees and MR12 below 85 degrees.

MadsDausel wrote:

How much more work to the engine? And have you try it on a dyno?

GoYamaha wrote:

It is a full motor.
High comp piston
GYTR head and cams
Carrillo Rod (balanced)
Polished, back cut and blued trans
Ceramic ...more

Sounds like a fast yzf tongue

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12/14/2018 9:51 AM

MadsDausel wrote:

Sounds like a fast yzf tongue

No clue yet, can’t ride until Feb/March due to injury so I won’t know until then unfortunately. This was a “dream build” for me. Never done this much to a motor until now.

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12/14/2018 11:42 AM

Any one know if big bore kits are available yet?

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